[RFC 0/4] drivers: footprint reduction proposal

[Walter Lozano <walter.lozano@collabora.com>]

Based on several reports and discussions it is clear that U-Boot's
footprint is always a concern, and any kind of reduction is an
improvement.

This series is a proposal to  help reducing the footprint by parsing
information provided in DT and drivers in different ways and adding
additional intelligence to dtoc. The current version implements the basic
functionality in dtoc but this is no fully integrated, however it will allow
us to discuss this approach.

Firstly, based on the compatible strings found in drivers, include only DT nodes
which are supported by any driver present in U-Boot.

Secondly, generate struct udevice_id entries only for nodes present in DT,
which will allow to avoid including additional data.

These are the first steps for further improvements as proposed in the specific
patches in this series.

This work is based on the work of Simon Glass present in [1] which adds
support to dtoc for parsing compatible strings.

[1] https://gitlab.denx.de/u-boot/custodians/u-boot-dm/-/tree/dtoc-working

Walter Lozano (4):
  dtoc: add POC for dtb shrink
  dtoc: add initial support for deleting DTB nodes
  dtoc: add support for generate stuct udevice_id
  mmc: fsl_esdhc_imx: make use of dtoc to generate struct udevice_id

 drivers/mmc/fsl_esdhc_imx.c |  58 ++++++++++++++------
 tools/dtoc/dtb_platdata.py  | 102 ++++++++++++++++++++++++++++++++++--
 tools/dtoc/fdt.py           |   3 ++
 3 files changed, 143 insertions(+), 20 deletions(-)

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2.20.1